Impact of pre-travel consultation on clinical management and outcomes of travelers' diarrhea: a retrospective cohort study.

Background: International travelers are at high risk of acquiring travelers' diarrhea. Pre-travel consultation has been associated with lower rates of malaria, hepatitis, and human immunodeficiency virus (HIV) infections. The objective was to study the impact of pre-travel consultation on clinical management and outcomes of travelers' diarrhea.

Methods: This retrospective cohort study analyzed 1160 patients diagnosed with travelers' diarrhea at Mayo Clinic Rochester, MN from 1994 to 2017. Variables included high-risk activities, post-travel care utilization, antimicrobial prescriptions, hospitalizations, and complications. Travelers were divided into those who sought ( n  = 256) and did not seek ( n  = 904) pre-travel consultation. The two groups were compared using the Wilcoxon test for continuous variables and chi-square test for categorical variables. Multivariate logistic regression was used to adjust for differences in traveler characteristics.

Results: More pre-travel consultation recipients were young Caucasians who had more post-travel infectious disease (ID) consultation [OR 3.1 (95% CI 1.9-5.3)], more stool sampling [OR 1.6 (95% CI 1.1-2.4)], and more antimicrobial prescriptions [OR 1.6 (95% CI 1.1-2.5)] for travelers' diarrhea compared to the non-pre-travel consultation group. The pre-travel consultation group had shorter hospital stays (mean 1.8 days for pre-travel versus 3.3 days for non-pre-travel consultation group, p  = 0.006) and reduced gastroenterology consultation rates [OR 0.4 (95% CI 0.2-0.9)]. 23 patients with positive stool cultures had Campylobacter susceptibilities performed; 65% (15/23) demonstrated intermediate susceptibility or resistance to ciprofloxacin.

Conclusion: Pre-travel consultation was associated with higher rates of stool testing and antimicrobial prescriptions. The high rate of quinolone-resistant Campylobacter in our small sample suggests the need for judicious antimicrobial utilization. The pre-travel consultation group did have a shorter duration of hospitalization and reduced need for gastroenterology consultation for prolonged or severe symptoms, which are positive outcomes that reflect reduced morbidity of travelers' diarrhea.